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## Research of iron ore grinding in a vertical-roller-mill

·Research of iron ore grinding in a vertical-roller-mill Article in Minerals Engineering 73 · March 2015 with 461 Reads DOI: 10.1016/j.mineng.2014.07.021

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Mar 28, 2015· Processes for Beneficiation of Iron Ores Iron is an abundant element in the earth's crust averaging from 2 % to 3 % in sedimentary rocks to 8.5 % in basalt and gabbro. Because iron is present in many areas, it is of relatively low value and thus a deposit must have a high percentage of metal to be considered ore grade.

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Ball Mill Ball Wear Projection. In any mill, the rate at which the weight of any ball decrease is directly proportional to its weight. In any mill, the rate at which the diameter of a ball decreases is directly proportional to its diameter. In any mill, the rate at which the

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·Mar 15, 2015· The first ore is from the Kiruna mine, which is the largest underground iron ore mine in the world. Kiruna ore has a magnetite content of around 90% . The Bond Work Index W i of the ore is 9.3 kW h/t. The second ore is from Mertainen, a potential new mine, about 30 km away from Kiruna. The magnetite content (about 70%) is lower compared to the Kiruna ore.

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grinding the reference and test ore with the same particle size distribution under the same determination of the work index of Birnin-Gwari iron ore in Nigeria. media for this experiment were calculated by applying Equations 2 and 3 where JB = fraction of mill occupied by the balls, = mass of ball charge, B = ball.

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## A discussion on the measurement of grinding media wear

·The main factor that influences the absolute wear rate of a grinding body is the abrasiveness of the ore, but the choice of material for the grinding body must balance characteristics as conflicting as high hardness which maximizes abrasive wear strength and adequate ductility

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Where the original material, without hardfacing has typical wear rates of 10-12 g/mt, the hard faced materials experience a wear rate of 4-6 g/mt. Further experience has shown that wear in the vertical roller mill is a function of the iron in the feed and iron concentration on the table material.

## Research of iron ore grinding in a vertical-roller-mill

·Research of iron ore grinding in a vertical-roller-mill Article in Minerals Engineering 73 · March 2015 with 461 Reads DOI: 10.1016/j.mineng.2014.07.021

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Wear conduct of Austempered Ductile Iron (ADI) balls in the grinding of iron ore in a ball mill process was examined as a function of microstructure developed by carrying out 2-stage asutempering heat treatment. Various microstructure of ADI are produced by austenitising SG (spheroidal ghaphite) iron balls at 9200 C for 60 minutes of time and given step austempering heat treatments those

## Table of Bond Abrasion Index for Varied Minerals-Materials

Table of Bond Abrasion Index for Varied Minerals-Materials View Larger Image The Bond Abrasion Test determines the Abrasion Index, which is used to determine steel media and liner wear in crushers, rod mills, and ball mills.

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## iron ore grinding ball mill media charging formulas

grinding the reference and test ore with the same particle size distribution under the same determination of the work index of Birnin-Gwari iron ore in Nigeria. media for this experiment were calculated by applying Equations 2 and 3 where JB = fraction of mill occupied by the balls, = mass of ball charge, B = ball.

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In iron ore, for instance, a variation of 2 to 3% solid content in the slurry could lead to a difference of up to 10% on the energy (kWh/T) for a similar grind.

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